Normally I have a very heavy period with unbearable cramps, with cravings and mood swings etc. However yesterday night I started it was so light normally I use ultra and change ever couple hrs but now I could prob get away with one regular tampon. I have no stress, exercise has not changed, diet has changed however I have maintained weight. It was brown yesterday and now a bright red or pinkish color, I do have cramps but barely and this is about a week before my period is due. Am I pregnant?